Jacquard loom



Nov. 8, 1938-. 5H, STOEHR 2,136,328

JACQUARD LOOM l Filed Nov. 12, 1957 fm O\ /2 /0 *4f a /a 7' y 7 i E i f /NVf/VTOK:

Han/S Soebr',

Patented Nov. Sz, 1938 UNITEDy STATES PATENT OFFICE 9 Claims.

This invention relates to Jacquard looms and, more particularly to the type` of looms used for weaving frieze and pile fabrics, such looms usually vemploying hooks for raising a certain number of threads or yarns simultaneously or in successive relationship, with capacity for predetermined 'lateral shifts. The capacity of such machines is limited and reduced whenthree dispositions of the warp thread are required.

The primary object of this invention is to pro- `vide'a novel type of hooks adapted more particularly, although not essentially for the weaving of double pile fabric, said hooks being arranged for lateral shifting preferably by aid of electro-magnetically or mechanically actuated needles under control of conventional jacquard cards. y

Another object is to provide a novel means whereby looms of the type mentioned above are raised to full capacity, and enabled to obtain such maximum capacity when the three dispositions of the warp thread is a prerequisite; that is to say for instance a 1288 hook rise-and-fall loom governs a corresponding number of warp threads.

A further object is to providemeans whereby the lthree dispositions of the warp threads are positively obtained, so that in a double-shuttle loom including the present invention the production or output is increased; the weaving of better patterned chintz is positively obtainable, and the operating overhead proportionately decreased. Other objects and ancillary advantages are hereinafter referred to or will be apparent from the following description of a typical embodiment of the present invention asfshown in the accom-1 panying drawing. In said drawing:`-

, Fig. lis a somewhat diagrammatic view of a loom construction embodying the present invention.

Fig. 2 is a similar illustration showing the sociated parts in reversed position.

Fig. 3 is a like View Yshowng the'hooks and needles ready for action or influence by an associated electromagnetic device hereinafter more fully explained, or when a circuit therethrough is closed. p Y

I Fig. 4 is abroken view illustrating the reverse position ofthe preceding view, or when the controlling circuit is about to open.`

Fig. 5 is an enlarged section of the electromagnetic controlling device.

Fig. 6 is a fragmentary view of the needle and hook novel combination; and, s Fig, '7 is a detail view hereinafter fully explained. In all the'views like or corresponding parts are designated by similar reference characters. f vReferring more in detail to the drawinga conventional jacquard card cylinder is indicated at I, for progressing a series of cards, 2, in accordance with known practice ;,while the hooks 3,r 4, are of special form. 'I'hese hooks 3, '4, it will be seen are of the bifurcated typebut havetheir free ends turned outwardly at 5, 6, for engagement with the lifting or stationary knives 1, 8, respectively; and

said hooks' are afforded vertical guidance in a suitable hookgrate 9. The hooks, 3, 4, are each outwardly directed or bellied at IIl to limit their downward movementrelative tothe hook grate 9, when not held up by -either knife "I, 8.

The associated needles II, I2 which are alternatelyl subject tothe jacquard cards 2 are suitably provided with dents ior bends I3, I4 Vfor coaction with the two portions or shanks of the hooks 3, 4 respectively, and it is to be particularly noted that the. distance between, or spacing of, Vthe bends I3, I4 shouldbe such that the respective wire Shanks or bifurcations are always `maintained in a predetermined definite positionk with respect .v

to` one anoth-er. VThe end of each needle II, I2, remote from the jacquard card cylinder I, is of the half-eye type, or retrov-erted'to form a loop I5 for passage of a conventional needle pin I6, and application of a coil springl'l in compression between suchpin and the curved free end I8 of rsaid needle; The loops I5 must be of a prede`- termined 'length to not only accommodate the parts I6, I 1, but also for passage of al lock or connectorpin I9,the,purpo se ofv whichY is to limit their outward movement relative to the electromagnetic control Adevice now to be described, and also to effect simultaneous retraction of reach pair of needles II, I2 to the middle position.

This electromagnetic device'comprises amagnet 20 which is energized from any suitable source of electric current, not shown; and a switch control preferably in the form of a suitable yinsulate-material casing 2|, having apertures 22 for passage thereinto of the needle'loops I5 of each associated pair of needles, II, I2, and wherein they are secured against illicit release by the lock pin I9, in an obvious manner. In opposed 'relation to the lock pin I9,.within theycasing 2|, there is secured a bearing block 23 for a post 24, affording support for a bridge member 25 under the influence of a spring 26 normally .tending to keep said member in the position shown in Figs. 4 and5. lThe bridge orswitch member 25 lit will be observed has cupped ends 21 for reception ofthe needle loopsy I5, and that 'it is capable of angular movement 'on ,thepost 24, as shown in Figs.` 1 and 2. Supported by screws 28, in opposed relation, within the casing 2I are contacts 29, 30 having electric lcurrent leads 3I, 32 respectively.

Assumingthat all odd hooks 3 are employed for the weave on the top piece of a double-pile fabric and the even hooks 4 `.weave the-bottom proved means, hereinbefore set-forth, may be briefly described as follows; Fig. 1 shows how the odd hooks 3 are raised by the lifting knife 1 because the needles Il have passed through card holes into the cylinder I; the even hooks 4 being held or pressed back by virtue of a registering hole in the card 2, and hence they are carried down with the hook grate 9 as the latter de scends. At the same time the associated needle loop ends l5 move the confronting cupped end 21 of the bridge member 25 into engagement with the contact 30, or negative pole of the electromagnetic device. Figure 2 illustrates the reverse action of the associated parts or when the hooks 3 are dropped and the even hooks 4 are raised by the lifting knife 1, whereupon the odd hooks 3 areengaged with the positive contact 29.

Figure 3 shows the effect produced when no card holesregister with either of the needles Il, l2, whereupon both of said needles engage the bridge member 25 and close an electric circuit through the device, with resultant attraction of both said needles toward the magnet 20. As a result of the action just described the hooks 3, 4, will be drawn by the pin i9 until their ends 6 hook over the stationary knives 8, or be placed in the middle position of Fig. 4. The timing of the electromagnetic device 20-32 is so regulated, in practice, that after passage of the shuttles the circuit just described will be broken or opened, whereupon the respective springs Il and 24 will return the needles Il, I2 to the next required position for drawing the succeeding sheds.

It is to be further remarked that by shutting off movement of the hook grate 9, a loom equipped with the mechanism of this invention may also be used for the weaving of single fabric by simply employing the full complement of hooks 3, 4.

Although a particular embodiment of the invention has been shown and described, it is evident that minor changes in the details of construction, as well as other combinations of the parts maybe resorted to, without departing from the spirit, and scope of the disclosure, and as more tersely expressed in the following claims.

Having thus described the invention, I claim:

1. In a Jacquard loom, the combination of a series of hooks each having the active ends-opposedly turned with their shanks arranged for coaction with the loom hook grate, associated needles having spaced dents for engagement with the hook shanks, means to retract the needles, and bridging means whereby each pair of needles is jointly retracted. l

2. In a Jacquard loom the combination of a series of hooks each having the active ends opposedly turned and their shanks arranged for coaction with the loom hook grate, associated needles having spaced dents for engagement with the hook-shanks, and a switch member arranged for bridging each card actuated pair of needles for closure of a circuit through electromagnetic means whereby the circuit through the switch member is opened by further retraction of the needles.

3. In a Jacquard loom the combination of a series of odd and even hooks each of which embodies a bifurcation having the active ends turned outwards and their shanks arranged for coaction with the loom hook grate, associated needles with spaced notches for engagement of said hooks to effect their movement, and means including'a switch member arranged for engaging positive and negative contacts included in said means for closure of an electric circuit through an appropriate magnet whereby each pair oi' odd and "even needles are jointly retracted to reopen said circuit.

4. In a Jacquard loom the combination of a series of odd and even hooks, arranged for production of double-pile fabric, each such hook embodying a bifurcated portion having the active ends outwardly turned in a common plane with confronting intermediate portions outwardly di rected for coaction with the loom hook grate, individual needles associated with said hooks and having spaced notches to effect their movement with the rst and second positions, and an electromagnetic device for jointly retracting the needles for placing the hooks in the middle position.

5. In a Jacquard loom combination of a series of odd and even hooks, arranged for production of double-pile fabric, each such hook embodying a bifurcated portion having the active ends outwardly turned in a common plane with confronting intermediate portions outwardly directed for coaction with the loom hook grate, individual needles associated with said hooks and having spaced notches to eiect their movement into the rst and second positions, electrically actuated means for retracting the odd and even needles individually, electro-magnetic means for jointly retracting said needles for placing the associated hooks in the middle position, and spring means for returning the needles and hooks to the next required position.

6. A Jacquard loom mechanism as defined 1n claim 5, wherein each hook consists of a length of wire medially bent to provide substantially parallellng shanks, each said shank embodying an outwardly turned active end with a correspondingly-directed coplanar bellied-sectionmedially of its length.

7. A Jacquard loom mechanism as dened in claim 5, wherein each needle embodies predeterminedly spaced dents for engagement with the associated hook shank portions proximate its card influenced end and having its other end formed into a loop of a length for entry into the electro-magnetic device, and a pin element passed through said needle loops for connecting them together and to normally hold each associated needle and hook against withdrawal from said electro-magnetic device.

8. A Jacquard loom mechanism as defined in claim 5, wherein the electro-magnetic device comprises a suitable insulate-material casing having apertures for entry thereinto of associated odd and even looped ends, an opposed bearing member affording spring-innuenced oscillatory support for a cup-ended bridging element for coac tion with the needle looped ends to close an electric circuit, and a relatively spaced magnet arranged to retract such bridging element to open said circuit.

O 9. A Jacquard loom mechanism as defined 1n `6` claim 5, wherein the electro-magnetic device comprises a suitable insulate-material casing having apertures for entry thereinto of associated odd and even looped ends, an opposed bearing member aiording spring-influenced oscillatory support for a cup-ended bridging ele- ,l ment for coaction with the needle looped ends to close an electro-magnetic circuit, a relatively spaced magnet arranged to retract the bridgingy Velement to open said circuit, and means to limit forward movement of the bridging element for automatic return of the needles to initial position.

' HANS STOEHR. 

